Redox preconditioning deep cratonic lithosphere for kimberlite genesis - evidence from the central Slave Craton

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10371260" target="_blank" >RIV/00216208:11310/17:10371260 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1038/s41598-017-00049-3" target="_blank" >http://dx.doi.org/10.1038/s41598-017-00049-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-017-00049-3" target="_blank" >10.1038/s41598-017-00049-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Redox preconditioning deep cratonic lithosphere for kimberlite genesis - evidence from the central Slave Craton

Popis výsledku v původním jazyce

We present the first oxygen fugacity (fO(2)) profile through the cratonic lithospheric mantle under the Panda kimberlite (Ekati Diamond Mine) in the Lac de Gras kimberlite field, central Slave Craton, northern Canada. Combining this data with new and existing data from garnet peridotite xenoliths from an almost coeval kimberlite (A154-N) at the nearby Diavik Diamond Mine demonstrates that the oxygen fugacity of the Slave cratonic mantle varies by several orders of magnitude as a function of depth and over short lateral distances. The lower part of the diamond-bearing Slave lithosphere (&gt; 120-130 km deep) has been oxidized by up to 4 log units in fO(2), and this is clearly linked to metasomatic enrichment. Such coupled enrichment and oxidation was likely caused by infiltrating carbonatebearing, hydrous, silicate melts in the presence of diamond, a process proposed to be critical for &quot;preconditioning&quot; deep lithospheric mantle and rendering it suitable for later generation of kimberlites and other SiO2-undersaturated magmas.

Název v anglickém jazyce

Redox preconditioning deep cratonic lithosphere for kimberlite genesis - evidence from the central Slave Craton

Popis výsledku anglicky

We present the first oxygen fugacity (fO(2)) profile through the cratonic lithospheric mantle under the Panda kimberlite (Ekati Diamond Mine) in the Lac de Gras kimberlite field, central Slave Craton, northern Canada. Combining this data with new and existing data from garnet peridotite xenoliths from an almost coeval kimberlite (A154-N) at the nearby Diavik Diamond Mine demonstrates that the oxygen fugacity of the Slave cratonic mantle varies by several orders of magnitude as a function of depth and over short lateral distances. The lower part of the diamond-bearing Slave lithosphere (&gt; 120-130 km deep) has been oxidized by up to 4 log units in fO(2), and this is clearly linked to metasomatic enrichment. Such coupled enrichment and oxidation was likely caused by infiltrating carbonatebearing, hydrous, silicate melts in the presence of diamond, a process proposed to be critical for &quot;preconditioning&quot; deep lithospheric mantle and rendering it suitable for later generation of kimberlites and other SiO2-undersaturated magmas.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA13-06958S" target="_blank" >GA13-06958S: Záznam minerálních a texturních znaků před exhumačního a před kolizního vývoje HP/UHP hornin v orogenní zóně</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

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Svazek periodika

7

Číslo periodika v rámci svazku

February 2017

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

000396939700001

EID výsledku v databázi Scopus

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